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FreeBSD Security Advisory - OpenSSL Issues

FreeBSD Security Advisory - OpenSSL Issues
Posted Jan 15, 2014
Site security.freebsd.org

FreeBSD Security Advisory - A carefully crafted invalid TLS handshake could crash OpenSSL with a NULL pointer exception. A flaw in DTLS handling can cause an application using OpenSSL and DTLS to crash. A flaw in OpenSSL can cause an application using OpenSSL to crash when using TLS version 1.2.

tags | advisory
systems | freebsd
advisories | CVE-2013-6449, CVE-2013-4353, CVE-2013-6450
MD5 | 4ecd654abd0aaee44e4ef6858c4cc839

FreeBSD Security Advisory - OpenSSL Issues

Change Mirror Download
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=============================================================================
FreeBSD-SA-14:03.openssl Security Advisory
The FreeBSD Project

Topic: OpenSSL multiple vulnerabilities

Category: contrib
Module: openssl
Announced: 2014-01-14
Affects: FreeBSD 10.0 prior to 10.0-RC5
Corrected: 2014-01-07 20:04:41 UTC (stable/10, 10.0-PRERELEASE)
2014-01-07 20:06:20 UTC (releng/10.0, 10.0-RC5)
2014-01-07 20:06:20 UTC (releng/10.0, 10.0-RC4-p1)
2014-01-07 20:06:20 UTC (releng/10.0, 10.0-RC3-p1)
2014-01-07 20:06:20 UTC (releng/10.0, 10.0-RC2-p1)
2014-01-07 20:06:20 UTC (releng/10.0, 10.0-RC1-p1)
CVE Name: CVE-2013-4353, CVE-2013-6449, CVE-2013-6450

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:http://security.FreeBSD.org/>.

I. Background

FreeBSD includes software from the OpenSSL Project. The OpenSSL Project is
a collaborative effort to develop a robust, commercial-grade, full-featured
Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3)
and Transport Layer Security (TLS v1) protocols as well as a full-strength
general purpose cryptography library.

II. Problem Description

A carefully crafted invalid TLS handshake could crash OpenSSL with a NULL
pointer exception. [CVE-2013-4353]

A flaw in DTLS handling can cause an application using OpenSSL and DTLS to
crash. [CVE-2013-6450]

A flaw in OpenSSL can cause an application using OpenSSL to crash when using
TLS version 1.2. [CVE-2013-6449]

III. Impact

An attacker can send a specifically crafted packet that could cause an OpenSSL
enabled application to crash, resulting in a Denial of Service.

IV. Workaround

No workaround is available.

V. Solution

Perform one of the following:

1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.

2) To update your vulnerable system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

# fetch http://security.FreeBSD.org/patches/SA-14:03/openssl.patch
# fetch http://security.FreeBSD.org/patches/SA-14:03/openssl.patch.asc
# gpg --verify openssl.patch.asc

b) Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

Recompile the operating system using buildworld and installworld as
described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>.

Restart all deamons using the library, or reboot the system.

3) To update your vulnerable system via a binary patch:

Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

VI. Correction details

The following list contains the correction revision numbers for each
affected branch.

Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r260404
releng/10.0/ r260405
- -------------------------------------------------------------------------

To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:

# svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base

Or visit the following URL, replacing NNNNNN with the revision number:

<URL:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

VII. References

<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4353>
<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6449>
<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6450>

The latest revision of this advisory is available at
<URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:03.openssl.asc>
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